Question

Find the derivative of the function.

f(x) = 9x^0.5 + 7x^−0.5

Need some help please . . . the decimal powers are tripping me up. >_<

Answer 1

I still use the formula: f'(x) = lim f(x+h) - f(x)/h right?
h->0

Answer 2

0.5*9*x^(-0.5) +(-0.5*7 *x^(-1.5))

Answer 3

4.5 x^(-0.5) -3.5x^(-1.5)

Answer 4

use the power rule

Answer 5

oh I see what you did, you dropped the powers . . . I forgot to do that O.O

Answer 6

exactly

Answer 7

wow, tyvm x3
that cleared it up perfectly!! thank you

Answer 8

any time, you are welcome!